Featured Image: Lightning is a common high energy phenomenon on Earth, like here during a storm over Bucharest, Romania. Image credit: Catalin.Fatu (Wikimedia Commons), CC BY-SA 3.0.
Papaer: Lightning strikes as a major facilitator of prebiotic phosphorus reduction on early Earth
Authors: Benjamin L. Hess, Sandra Piazolo, Jason Harvey
You might think of lightning as a violent and destructive force of nature, but it might have helped to spark life on Earth. The enormous energy released by lightning can weather or even melt rocks. During this short, but intense heating phase, the rock’s or soil’s mineralogy changes and a very important element for life becomes available: phosphorus. Many molecules, essential for biological systems, need it. For example, the backbone of our DNA and RNA is made of phosphor bonds.
Continue reading “How lightning changes rocks – Reduction of phosphorus minerals”
Paper: Unraveling biogeochemical phosphorus dynamics in hyperarid Mars‐analogue soils using stable oxygen isotopes in phosphate
Authors: Jianxun Shen, Andrew C. Smith, Mark W. Claire, Aubrey L. Zerkle
Many geologists believe that ancient Mars, with its warmer temperatures and water-rich environment, may have been home to life. To test this hypothesis, astrobiologists must find signifiers of life that can survive the billions of years of hyperaridity experienced on the Martian surface. One such method could be identifying biotic alteration of the geochemical cycling of phosphorus, as was highly publicized during the recent discovery of phosphine in the atmosphere of Venus. Researchers have taken the first step in this search by characterizing biological phosphorus cycling in the analog environment of the Atacama Desert – an endeavor that has applied novel techniques in chemistry to provide insights about the movement of phosphorus in arid environments.
Continue reading “To P, not to P? That is (an oversimplification of) the biogeochemical question—”